Designation A678/A678M – 05 (Reapproved 2009) Standard Specification for Quenched and Tempered Carbon and High Strength Low Alloy Structural Steel Plates1 This standard is issued under the fixed desig[.]
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn Contact ASTM International (www.astm.org) for the latest information Designation: A678/A678M – 05 (Reapproved 2009) Standard Specification for Quenched-and-Tempered Carbon and High-Strength LowAlloy Structural Steel Plates1 This standard is issued under the fixed designation A678/A678M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision A number in parentheses indicates the year of last reapproval A superscript epsilon (´) indicates an editorial change since the last revision or reapproval General Requirements for Delivery 3.1 Plates furnished under this specification shall conform to the applicable requirements of the current edition of Specification A6/A6M unless a conflict exists, in which case this specification shall prevail Scope 1.1 This specification covers quenched-and-tempered carbon steel and high-strength low-alloy steel plates of structural quality for welded, riveted, or bolted construction 1.2 If the steel is to be welded, it is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be used 1.3 Plates under this specification are available in four grades as follows: Grade A B C D A Yield Strength, min, ksi [MPa] Tensile Strength, ksi [MPa] 50 [345] 60 [415] 70–90 [485–620] 80–100 [550–690] A A 75 [515] 90–110 [620–760] Materials and Manufacture 4.1 The requirements for fine austenitic grain size in Specification A6/A6M shall be met Maximum Thickness, in [mm] Heat Treatment 5.1 The plates shall be heat treated by heating to a temperature that produces an austenitic structure, but not exceeding 1700°F [925°C], holding a sufficient time to attain uniform heat throughout the material, quenching in a suitable medium, and tempering at not less than 1100°F [593°C] The heattreatment temperatures shall be reported in the test report 11⁄2 [40] 21⁄2 [65] [50] [75] Varies with thickness See Table 1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard Within the text, the SI units are shown in brackets The values stated in each system are not exact equivalents; therefore, each system is to be used independently of the other Chemical Composition 6.1 The heat analysis shall conform to the requirements given in Table for the applicable grade 6.2 The product analysis shall conform to the requirements given in Table 2, subject to the product analysis tolerances in Specification A6/A6M Referenced Documents 2.1 ASTM Standards:2 A6/A6M Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling A370 Test Methods and Definitions for Mechanical Testing of Steel Products Tension Test 7.1 The plates as represented by the test specimens shall conform to the requirements given in Table specified for the applicable grade 7.2 Number of Tests—One tension test shall be taken from a corner of each plate as heat treated This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.02 on Structural Steel for Bridges, Buildings, Rolling Stock and Ships Current edition approved Oct 1, 2009 Published December 2009 Originally approved in 1973 Last previous edition approved in 2005 as A678/A678M – 05 DOI: 10.1520/A0678_A0678M-05R09 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website Keywords 8.1 bolted construction; carbon; high-strength; low-alloy; plates; quenched; steel; structural steel; tempered; welded construction Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States A678/A678M – 05 (2009) TABLE Mechanical RequirementsA Grade A Yield strengthB, ksi [MPa] To 3⁄4 in [20 mm], incl Over 3⁄4 to 11⁄2 in [20 to 40 mm], incl Over 11⁄2 to in [40 to 50 mm], incl Over to 21⁄2 in [50 to 65 mm], incl Over 21⁄2 to in [65 to 75 mm], incl Tensile strength, ksi [MPa] To 3⁄4 in [20 mm], incl Over 3⁄4 to 11⁄2 in [20 to 40 mm], incl Over 11⁄2 to in [40 to 50 mm], incl Over to 21⁄2 in [50 to 65 mm], incl Over 21⁄2 to in [65 to 75 mm], incl Elongation in in [50 mm], min, %DE Grade B 50 [345] 50 [345] 60 60 60 60 C C [415] [415] [415] [415] C C 70–90 [485–620] 70–90 [485–620] 80–100 80–100 80–100 80–100 C C Grade C 75 [515] 70 [485] 65 [450] C C [550–690] [550–690] [550–690] [550–690] 95–115 [655–790] 90–110 [620–760] 85–105 [585–720] C C C C 22 22 19 Grade D 75 75 75 75 75 [515] [515] [515] [515] [515] 90–110 90–110 90–110 90–110 90–110 18 [620–760] [620–760] [620–760] [620–760] [620–760] A See Specimen Orientation under the Tension Tests section of Specification A6/A6M B Measured at 0.2 % offset or 0.5 % extension under load C The size and grade is not described in this specification D For thickness of 3⁄4 in [20 mm] and under, measured on 11⁄2-in [40-mm] wide full thickness rectangular specimen as shown in Fig of Test Methods and Definitions A370 The elongation is measured in a 2-in [50-mm] gage length that includes the fracture and which shows the greatest elongation E For plates wider than 24 in [600 mm], the elongation requirement is reduced two percentage points See elongation requirement adjustments in the Tension Tests section of Specification A6/A6M TABLE Chemical Requirements NOTE 1—Small amounts of alloying elements may be present, but shall not exceed the following amounts: Cu-0.35; Ni-0.25; Cr-0.25; Mo-0.08 NOTE 2—Where “ .’’ appears in this table there is no requirement Composition, % Element Carbon, max Manganese 11⁄2 in [40 mm] and under in thickness Over 11⁄2 to 21⁄2 in [40 to 65 mm], incl Over 21⁄2 to in [65 to 75 mm], incl Phosphorus, max Sulfur, max Silicon Vanadium Columbium Nitrogen, max Copper, min, if specified A B C Grade AA Grade BA Grade CA Grade DA 0.16 0.20 0.22 0.22 0.90–1.50 0.70–1.35 1.00–1.60 1.15–1.50 B 1.00–1.60 1.00–1.60 1.15–1.50 B B B 1.15–1.50 0.035 0.04 0.15–0.50 0.20 0.035 0.04 0.15–0.50 0.20 0.035 0.04 0.20–0.50 0.20 0.035 0.04 0.15–0.50 0.04–0.11 C 0.03 0.20 Boron may be added only by agreement between the manufacturer and the purchaser This size and grade is not described in this specification Columbium may be present in the amount of 0.01 to 0.05 % SUPPLEMENTARY REQUIREMENTS Supplementary requirements shall not apply unless specified in the purchase order or contract Standardized supplementary requirements for use at the option of the purchaser are listed in Specification A6/A6M Those that are considered suitable for use with this specification are listed in this section by title S5 Charpy V-Notch Impact Test A678/A678M – 05 (2009) ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above address or at 610-832-9585 (phone), 610-832-9555 (fax), or service@astm.org (e-mail); or through the ASTM website (www.astm.org) Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/ COPYRIGHT/)